December 24, 2023

Flu vs COVID vs RSV (Respiratory Illness)

Flu, COVID-19, or RSV? How to Tell the Difference

Identifying respiratory illnesses can be challenging, especially when symptoms overlap. With the onset of flu season and the persistent threat of COVID-19, it’s more important than ever to distinguish between these respiratory infections.

The US is currently experiencing elevated rates of COVID, flu, and RSV- and hospital visits for these illnesses are increasing as well. Seeking timely medical attention is key, and that’s why we encourage you to consult your healthcare provider if you experience any symptoms.

The good news? You can now get tested for COVID, flu, and RSV simultaneously, streamlining the diagnostic process and ensuring a comprehensive assessment of your health.

 

Virus Comparison

Flu Covid RSV
Fever or chills
Cough
Sore throat
Runny or stuffy nose
Muscle or body aches
Headaches
Fatigue (tiredness)
Vomiting
Diarrhea		 Fever or chills
Cough
Shortness of breath or difficulty breathing
Fatigue
Muscle or body aches
Headache
New loss of taste or smell
Sore throat
Congestion or runny nose
Nausea or vomiting
Diarrhea		 Coughing or wheezing
Sneezing
Runny nose
Decreased appetite
Fever
Symptoms begin 1 to 4 days after infection. Symptoms begin 2 to 14 days after infection. Symptoms begin 4 to 6 days after infection.
 

 

Triple Virus Epidemic

Our community is facing a triple epidemic. The rates of COVID, flu, and RSV are increasing rapidly. According to the CDC, the amount of acute respiratory illness causing people to seek healthcare is at a high level and continues to increase nationally:
  • COVID-19 activity is increasing in most areas of the country
  • RSV activity is very high, particularly in young children, and emergency department visits are increasing
  • Flu activity continues to increase and is elevated across most of the country
The increase in illness puts many at risk and can cause an uptick in emergency room visits. It’s crucial for all of us to take steps to protect ourselves and others, like getting vaccinated, getting tested, and following recommended safety measures. Together, we can work to keep our community safe and healthy.
 

 

Triple Virus Testing

Because of the similarity in symptoms, it can be difficult to determine which of these viruses is causing your illness. Don’t wait or guess- the best way to know is to get tested. Fortunately, HNL Lab Medicine offers testing that checks for all three viruses. Simply head to your healthcare provider or closest urgent care center to get tested for all three viruses.

Timely testing not only helps you understand your condition but also plays a crucial role in preventing the further spread of these viruses within our community. By taking this simple yet impactful step, you contribute to the collective effort to protect yourself and others. 

 

updated: 1/9/25

REFERENCES

Centers for Disease Control and Prevention. (2025, January 3). Respiratory Illnesses Data Channel. U.S. Department of Health and Human Services. https://www.cdc.gov/respiratory-viruses/data/index.html.
Centers for Disease Control and Prevention. (2024, June 13). About COVID-19. U.S. Department of Health and Human Services. https://www.cdc.gov/covid/about/index.html.
Centers for Disease Control and Prevention. (2024, August 13). About Influenza (Flu). U.S. Department of Health and Human Services. https://www.cdc.gov/flu/about/index.html.
Centers for Disease Control and Prevention. (2024, August 30). About Respiratory Syncytial Virus Infection (RSV). U.S. Department of Health and Human Services. https://www.cdc.gov/rsv/about/index.html.